Title:
HIGH CAPACITY,HIGH SIDE-TONE SUPPRESSION,4-WIRE CONFERENCE CIRCUIT
United States Patent 3551600


Inventors:
Berch, William H.
Application Number:
US3551600DA
Publication Date:
12/29/1970
Filing Date:
02/23/1968
Assignee:
STROMBERG CARLSON CORP
Primary Class:
International Classes:
H04M3/56; (IPC1-7): H04M3/56
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